ambassador tom pickering, probably the most senior member conducting that investigation, you to read all of the e-mails, all of the cables, all of the meetings, and you make an assessment of who bears some responsibility in this issue. is it diplomatic security? is intelligence? i think there's another issue here which really concerns me and that at one point the disclosure of some of our libyan assets was made publicly by one of the house committees. i think we have to be very careful about issues like sources and methods to ensure that in this investigation, which should happen, it is the role of the congress, that your responsible, you're not damaging american national security interests. >> but, governor, i also want to ask the other piece of the puzzle is david patreaus. and in the weeks after the incident in benghazi, the vice president laid some blame or some onus on the shoulders of the cia, general patreaus was director at that point, he's volunteered to testify, he will testify friday, amid swirling scandal. but to what degree do you think he needs to play defense on this?